rails/rails — pull request #9239 by senny (2013-02-10 17:07:02+00:00)
Title: ignore .ruby-version instead of tool specifc config on 3-2-stable

It's not very practical to have different ignores for ruby-version configuration files on master and 3-2-stable. I suggest we also ignore `.ruby-version` on `3-2-stable` as we did on master.

This is a combined backport of 36acc0a and 99bb2fd